WNS Series horizontal Oil-fired (Gas) Boiler
-7-
change a new one.
3.10 Loss voltage protection
While normally running boiler, the electric network may have no power or the voltage is
dropped suddenly because of one certain reason, boiler will stop running. When electric
network is back to normal condition, the boiler unit will not start operation automatically. Now
should push the burning start button again, then boiler can continue running again so as to
avoid bad result.
3.11 Valve leakage protection
When there are leakages inside gas pipeline, insure the burner no start.
3.12 Low gas pressure protection
When the gas pressure inside pipeline is lower than set point, insure burner no start.
3.13 Low wind pressure protection
When the fan appear too low wind pressure because of a certain reason, will cut off
burning automatically or burner no start.
Ⅳ、
Boiler work principle
The boiler tubes of heating surface and furnace absorb the heat of firing oil, transfer it to
the boiler water, and when the water change to steam because of heating, steam will be up and
enter into the vapor space because its specific gravity was reduced, and the left space will be
made up by the water with more heavy specific gravity, so this process will form a natural
steam-water circulation. When the water level become lower because water changed into the
steam continuously, the water pump will feed water into the boiler so as to keep it in the
normal water level. The above-mentioned process continues, steam will continuously produced
by heating the water by absorbing the afterheat of firing oil.
Ⅴ、
Operation Manual of Gas Fired Boiler
Please refer to the Operation Manual of Gas Ffired Boiler that we provide for you.
Ⅵ、
Operation requirements
①
Preparation before operating
Before operating, please check all boiler parts carefully, the detail is as following:
1.1
Whether the manhole and hand-hole is sealed, whether the fitting parts is safety.
1.2
Whether the fitting parts is safety.
1.3
Whether the damper is very agility.
1.4
Whether the steam pipeline, feeding water pipeline, fuel oil & gas pipeline is sufficient.
1.5
Whether all control switch of control box is set on the location
“
OK
”
.
②
Boiling out for boiler
After finishing install & inspection for all boiler parts, confirm they are safety, then can do
boiling out for boiler.
2.1 In general, the boiling out for new boiler should be performed before starting the unit. It is
mainly remove the impurity and oil dirt inside boiler. While boiling out for boiler, should add
some suitable chemical medicine, make boiler water become alkaline water and remove oil dirt
and impurity.
2.2 Boiling out for boiler can use the chemical medicine of Na
2
CO
3
or Na
3
PO
4
·
12H
2
O,
compound the above medicine with water as the uniform solution with concentration of 20%. It
is not permitted that add the solid medicine into boiler directly.
Medicine quantity (kg/m
3
)
Medicine name
The rust is very thin
The rust is very thick
NaOH
2
～
3
3
～
4
